Pre-lithiated silicon/carbon nanosphere anode with enhanced cycling ability and coulombic efficiency for lithium-ion batteries

Han, Danyang; Xiang, Shili; Cunha, João; Xie, Yijian; Zhou, Miao; Hou, Zhaohui; Yin, Hong

doi:10.1016/j.est.2023.110183

Cited by 10 publications

(1 citation statement)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ultimately, these electrode materials fall off from the current collector, losing electrical contact and causing a rapid decline in the reversible capacity of the electrode [ 10 ]. In addition, the semiconductor properties of Si lead to poor conductivity, which compromises the rate performance of Si anode [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Simple and Safe Synthesis of Yolk-Shell-Structured Silicon/Carbon Composites with Enhanced Electrochemical Properties

Li,

Wu,

et al. 2024

Molecules

View full text Add to dashboard Cite

With its substantial theoretical capacity, silicon (Si) is a prospective anode material for high-energy-density lithium-ion batteries (LIBs). However, the challenges of a substantial volume expansion and inferior conductivity in Si-based anodes restrict the electrochemical stability. To address this, a yolk-shell-structured Si–carbon composite, featuring adjustable void sizes, was synthesized using tin (Sn) as a template. A uniform coating of tin oxide (SnO2) on the surface of nano-Si particles was achieved through a simple annealing process. This approach enables the removal of the template with concentrated hydrochloric acid (HCl) instead of hydrofluoric acid (HF), thereby reducing toxicity and corrosiveness. The conductivity of Si@void@Carbon (Si@void@C) was further enhanced by using a high-conductivity carbon layer derived from pitch. By incorporating an internal void, this yolk-shell structure effectively enhanced the low Li+/electron conductivity and accommodated the large volume change of Si. Si@void@C demonstrated an excellent electrochemical performance, retaining a discharge capacity of 735.3 mAh g−1 after 100 cycles at 1.0 A g−1. Even at a high current density of 2.0 A g−1, Si@void@C still maintained a discharge capacity of 1238.5 mAh g−1.

show abstract

Section: Introductionmentioning

confidence: 99%

Simple and Safe Synthesis of Yolk-Shell-Structured Silicon/Carbon Composites with Enhanced Electrochemical Properties

Li,

Wu,

et al. 2024

Molecules

View full text Add to dashboard Cite

show abstract

Carbon‐Based 3D Architectures as Anodes for Lithium‐Ion Battery Systems

Aslam,

Ahsan Waseem,

Zhang

et al. 2024

ChemPlusChem

View full text Add to dashboard Cite

Graphite, with its exceptional cyclic performance, continues to dominate as the preferred anode material for lithium−ion batteries. However as high−energy application gains momentum, there is growing demand for higher capacities that alloying/de alloying and conversion type anode materials can offer. Despite their potential, these materials are plagued by challenges such as volumetric fluctuations, low conductivities, and poor cyclic stability. Carbon nanostructures, on the other hand, show tremendous promise with their low volume expansion, high ion diffusion rates, and excellent conductivity. Nevertheless, their limited areal and volumetric densities restrict their widespread utilization. To address these limitations, various strategies such as doping, composite formation, and structural modification have been proposed. This article provides a succinct overview of carbon nanomaterials and their electrochemical performance as 3D carbon–based anodes, along with a comprehensive analysis of the strategies employed to overcome associated challenges while evaluating their potential prospects in the field.

show abstract

Molecular Engineering Chemical Pre‐lithiation Reagent with Low Redox Potential for Graphite Anode Enables High Coulombic Efficiency

Li,

Jiang,

Feng

et al. 2024

Small

View full text Add to dashboard Cite

Graphite (Gr) is a low‐cost and high‐stability anode for lithium‐ion batteries (LIBs). However, Gr anode exhibits an obstinate drawback of low initial Coulombic efficiency (ICE), owing to the active lithium loss for the solid electrolyte interphase (SEI) layer. Herein, a straightforward and effective chemical pre‐lithiation strategy is proposed to compensate for the lithium loss. A molecular engineering phenanthrene‐based lithium‐arene complex (Ph‐based LAC) reagent is designed by density functional theory (DFT) calculations. The engineering Ph‐based reagent enhances the stability of the π‐electron system and the electron‐donating capacity, resulting in a reduced redox potential to facilitate lithium transfer. The electrochemical distinct of the Ph‐based reagent is illustrated, the prelithiation process in a low Li‐insertion platform, and the lithiation degree is controllable with the dipping time (ICE = 102%, 3 min). Notably, a denser and homogeneous SEI layer has pre‐formed to enhance the Li+ transport and interface stability. Moreover, the lithium‐ion full batteries assemble with LiFePO4 and NCM811 cathode, which exhibits high ICE (96.5% and 90.3%) and energy density (310 and 333 Wh kg−1). These findings present a facile and controllable pre‐lithiation strategy to compensate for the lithium of LIBs, providing new valuable insights into the design and optimization of battery manufacture.

show abstract

Pre-lithiated silicon/carbon nanosphere anode with enhanced cycling ability and coulombic efficiency for lithium-ion batteries

Cited by 10 publications

References 40 publications

Simple and Safe Synthesis of Yolk-Shell-Structured Silicon/Carbon Composites with Enhanced Electrochemical Properties

Simple and Safe Synthesis of Yolk-Shell-Structured Silicon/Carbon Composites with Enhanced Electrochemical Properties

Carbon‐Based 3D Architectures as Anodes for Lithium‐Ion Battery Systems

Molecular Engineering Chemical Pre‐lithiation Reagent with Low Redox Potential for Graphite Anode Enables High Coulombic Efficiency

Contact Info

Product

Resources

About